Filter and Mask configuration of FlexCAN for SPC560

[YLin.2]

Hi,

I can't find any document that defines the Filter and Mask for FlexCAN, so I post a question about it.

I think the filter only passes frames that contain exact ID as the ID in ID mask field. Am I right?

Best regards

Yuechuan Lin

[DCARR]

Hi,

YES you are right.

The CAN controller is configured to use the RX global mask that is set to 0x0FFFFFFF

Best regards

Domenico

[PChia.2237]

Is possible to change or just check this RX global mask?

Because i have a problem in standard RX that seams that filter mask is not 0x7FF , but 0x3FF.

I have tested in this way:

RX ID= 0x1

up to message id 0x201 -> 0b 0010 0000 0001 filter works

if i send message id 0x401 ->0b 0100 0000 0001 filter not works, because i i receive the message.

Best Regards,

Patrick

[PChia.2237]

I have solved replacing in can_lld.h

canp->flexcan->RXGMASK.R = 0x0FFFFFFFU;

with

canp->flexcan->RXGMASK.R = 0xFFFFFFFFU;